bundles/org.simantics.structural2/src/org/simantics/structural2/scl/FindComponentTypeRequest.java

   1 package org.simantics.structural2.scl;\r
   2 \r
   3 import org.simantics.db.ReadGraph;\r
   4 import org.simantics.db.Resource;\r
   5 import org.simantics.db.common.request.ResourceRead;\r
   6 import org.simantics.db.exception.DatabaseException;\r
   7 import org.simantics.layer0.Layer0;\r
   8 import org.simantics.structural.stubs.StructuralResource2;\r
   9 import org.simantics.utils.datastructures.Pair;\r
  10 \r
  11 /**\r
  12  * Given component finds a component type it belongs to\r
  13  */\r
  14 public class FindComponentTypeRequest extends ResourceRead<Pair<Resource,Integer>> {\r
  15 \r
  16         public FindComponentTypeRequest(Resource resource) {\r
  17                 super(resource);\r
  18         }\r
  19 \r
  20         @Override\r
  21         public Pair<Resource,Integer> perform(ReadGraph graph) throws DatabaseException {               \r
  22                 StructuralResource2 STR = StructuralResource2.getInstance(graph);               \r
  23                 Resource type = graph.getPossibleObject(resource, STR.Defines);\r
  24                 if(type != null)\r
  25                         return Pair.make(type, 0);              \r
  26 \r
  27                 Layer0 L0 = Layer0.getInstance(graph);\r
  28                 Resource parent = graph.getPossibleObject(resource, L0.PartOf);\r
  29                 if(parent != null) {\r
  30                     Pair<Resource,Integer> result = \r
  31                             graph.syncRequest(new FindComponentTypeRequest(parent));\r
  32                         return Pair.make(result.first, result.second+1);\r
  33                 }\r
  34 \r
  35                 throw new DatabaseException("Unexpected graph structure at " + resource + ".");\r
  36         }\r
  37 \r
  38 }\r